These include a range of formulations for thermionic and field effect surface emission, secondary emission from surfaces and from within volumes, and magnetized plasma emission the last of these being a specialized plasma emission module designed for the efficient analysis of magnetron sputter coating systems.
The hyperopic shift in refraction observed in ketamineâxylazine-anesthetized mice theoretically may be caused by either reduction in the axial length of the eye or changes in the refractive indices of the ocular media.
The PTK procedure stops whenever the cornea looks smoother, but in any case, no more than 100 further pulses (300 total) are applied, in order to avoid a major hyperopic shift. Used with this technique, the typical hyperopic shift is about 1 D on average.